Serena and fiance Alexis Ohanian documented their pregnancy journey via Snapchat videos and candid pics, eventually editing the footage into a moving video diary, which they then shared via Youtube on Wednesday.

"Welcome, Olympia, we're so happy to meet you. We made you a video of our adventure together so far," Alexis wrote on Instagram.

The 2-minute video offers a peek into the couple's life together as they prepared for the arrival of their new addition, all leading up to the eventual birth of Alexis Olympia, which apparently was not without complications.

"So we're leaving the hospital after six, seven days," Serena says in the video, adding, "It's been a long time, we had a lot of complications, but look who we got — we got a baby girl!"

"Came in as two, out as three," Alexis added.

Check out the video below. Just make sure you have your Kleenex handy first — it's a tearjerker.